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Under evidence of the clear growth of the auto parts sector in the state of Tlaxcala, Mexico, but without certainty of a long-term sustainable base. A study is carried out to determine the level of implementation of tools of the lean manufacturing system in this sector, since this system, with a good focus and implementation, presents considerable improvements in the growth and stability of companies. Under the established methodology, a fairly consistent result is obtained, although with some deficiencies in some factors, such as innovation and operator participation.